Lamp support for projection machines



Nov. 3, l931.\ s. FRAPPIER. E1- AL 1,830,37

LAMP SUPPORT FOR PROJECTION MACHINES Original Filed Aug. 3l, 1928 Ewa/d beck/'ng 32kt 77%# @www t `Intent-sel Nov. 3, 1931 UNITED STATES PATENT oFFlcE LOUIS SIMON FRAPPIER AND E WALD BOECKING, OF BROOKLYN, NEW YORK, ASSIGNORS` TO INTERNATIONAL PROJECTOR CORPORATION, OF NEW YORK, N. Y., A CORPORATION or DELAWARE l LAMP SUPPORT FOR PROJECTION MACHINES ginal application led August 31, 1928, Serial No. 303,162. Divided and this application led November i 30, 1928. Serial No. 322,787.

This invention relates to "motion picture l projection apparatus, and more particularly to a light source for use in conjunction therewith and to anew and improved means-tor mounting the same. v

lThis application is a division of our copending application, Serial No. 303,162, filed August 31, 1928, for improvements 1n projecton machine.

An object of the invention is toprovide for the rapid replacement of the light source of a projection machine.

Another object isA to provide an auxiliary light source together with means for bringing said source into operative position.

A further object is to provide a plurality of light sources in a projection machine and means for selectively bringing said sources into operative position.

A still further object is to provide a new and improved mounting for a light source whereby the position thereof may be readily controlled.

The above objects and others which will be apparent as the nature of the invention. is

disclosed are accomplished by mounting a plurality of light sources in peripherally spaced relationship on a rotatable support. One of said sources is normally maintained in operative position ladjacent the projection apparatus while another source is held in readiness tor replacement service, and may be brought into operative position by rotaty rays of'light through the sound record of a ing the support.

- The invention 1s particularly applicable to a mounting for the light source of a soun telescope which is used to pass continuous projection film. It may, however, be employed for the projection light or invarious other locations as will be apparent to a person skilled in the art.

The invention also consists in certain new 'and original features ot construction and combinations of parts hereinafter set forth and claimed. y

Although the novel features which are be-` lieved to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the 'invention itself, as to operation and the manner of its organization may be better understood by referring to the following description taken in connection with the accompanying drawings forming a part thereof, in which Fig. 1 is a side elevation of the light chamber showing the adjustable support for the light source constructed in accordance with the present invention; and

Fig. 2 is a sectional view of the supporting mechanism showing its relationship to the light source and the telescope.

Like reference characters denote like parts in the several gures of the drawings.

In the following description and in the claims parts will be identified by specific naines for convenience, but they are intended to be as generic in their application to similar parts as the art will permit.

Referring to the drawings more in detail, the invention is shown as 'applied to a light chambercontaining a pair of light sources 10 and 11, and a telescope 12 which is adjustably mounted adjacent one of said sources for directing the light rays therefrom through the aperture/plate 13, over which a film 14 is, adapted to pass. Telescope 12 is mounted'in sleeve 154 forming a part of slidableV supporting bracket 16. Said bracket 16 is adapted to slide on supporting arm 17 for adjusting the transverseposition of said telescope. The particular mounting for said telescope, however, forms no part of the present invention, and is described more in detail in our co endinr a lication 'above mentioned.

Lamps 10 and 11 are mounted in sockets 21 which are rotatably secured in-cooperating relationship with'telescope 15.' Sockets 21 are secured by screws 22 to sleeve 23 which is rotatable about bushing 24. Spring pressed detent 25, cooperating with grooves` 26. secures sleeve23 in its desired position. Bushing 24 is secured bv-nuts 28 and 29 to member 27 which is slidable on arm 17. Contact strip 30 is adapted to make Contact with the base of lamp 10 in socket 21, and is' eX- ternal'ly connected to stationary rod 31 which passes through insulating bushing 32 and terminates in round nut 33. Contact strips 34 and 35 make electrical contact with nuts 33 and 29 respectively and are connected to an external circuit (not shown) for supplying lamp 10.

Slidabl'e member 27 is normally locked to bracket 16 by means of pin 40 which is secured in said bracket and spring pressed detent 41 which is pivotally mounted on member 27 in any desired manner.y Said detentis provided at its free end with wing members 42 which are bent upwardly whereby said Vdetent may be readily applied over pin 40. Grooved rods 43 and 44 may be utilized for locking member 27 and bracket 16 respectively to supporting rod 17.

Lamps 10 and 11 may be selectively brought into operative position by rotating the supporting framework through an angle of 180. This permits a burned out lamp to be replaced in the machine without interrupting the operation thereof.

It is to be noted that, in the arrangement above described, lamp 10 may be utilized for projecting a ray of light either through the picture or through the sound record of the llm in a manner which is wel] known in the art. Lamp 11 is at all times held in readiness to be instantly brought into operative position for replacing lamp 10 whenever the occasion may arise. Contact strip 30 makes contact with whichever lamp is in operative position and supplies current thereto. Consequently no manipulation is required other than a mere rotation of sockets 21.'

While the lamps have been shown and described as mounted for rotation about a horizontal axis it is obvious that they may be mounted for rotation about a vertical axis if desired. Furthermore, telescope 12 has been shown in order to illustrate an apparatus which may cooperate with lamp 10. It isA understood that said telescope may represent a portion of the lamphouse of a projection apparatus, in which case lamps 10 and 11 would constitute the source of the projection rays of the machine.

It is obvious also that any desired number of sockets may be peripherally spaced about sleeve 23. Two such sockets have been shown by wav of illustration only.

While certain novel features of the invention have been shown and described and are pointed out in the annexed claims. it will be understood that various omissions. substitu tions and changes in the forms and details of, the device illustrated and in its operation may be made by those skilled in the art without departing from .the spirit of the invention.

What is claimed is:

1. In a projection machine. a pair of light sources. sockets therefor. a rotatable sleeve, means for mounting said sockets thereon. a slidable support for said sleeve, means for mounting said support whereby the position of said source may be adjusted, and means for locking said support in adjusted position.

2. In a projection machine having a telescope, an arm extending in a direction transverse to the axis of said telescope, a bracket slidably supported on said arm for move ment transverse to the axis Vof said telescope, means for locking said bracket in operative position, a tubular member secured to said bracket, a metallic sleeve mounted for rotation on said member, a plurality of lamp sockets secured to said sleeve, an insulating bushing mounted in said tubular member, a conductor extending through said bushing, a spring member connected to said conductor and adapted to supply current to a lamp in one of said sockets, means for applying current to said sleeve, means for applying current to said conductor and detents carried by said sleeve and cooperating with stationary recesses for selectively securing said sockets in operative position with respect to said telescope.

3. In a projection machine having a telescope, an arm extending in a direction transverse to the axis of said telescope, a bracket slidably supported on said arm for movement transverse to the axis of said telescope,

a metallic member rotatably mounted on said bracket, a plurality of lamp sockets secured to said member, and detents for selectively securing said sockets in operative position with respect to said telescope.

4. In a projection machine having a telescope, an arm extending in a direction transverse to the axis of said telescope, a bracket slidably supported on said arm for movement transverse. to the axis of said telescope, a member rotatably secured to said bracket, a plurality of lamp sockets adjustably secured to said member, Aa spring member adapted to conduct current to a lamp in one of said sockets, and detents carried by said sleeve and cooperating with stationary recesses for selectively securing said sockets in operative position with respect to said telescope.

5. In a projection machine having a telescope, an arm extending .in a direction trans verseto the axis of said telescope, a bracket slidably supported on said' arm for movement transverse to the axis of said telescope, a member secured to said bracket, a metallic sleeve mounted for rotation on said member,`

carried by said bracket, a plurality Iof light A los lll

sockets attached to said sleeve, a conductor extending through said sleeve and adapted to contact with the base of one of said sockets` and brushes carried by said arm and adapted to apply current to said conductor and said sleeve respectively, said brusbes and said bracket being so arranged that said bracket may be slidably removed from said arm.

7. A support for a plurality of light sources, comprising a rotatable member, a bracket carrying said member, means for ad- `iusting said bracket transverse to the axis 'of said member, means for applying current to a selected source, and means whereby said bracket may be removed and disconnected by movement in a continuous direction.

8. A support for a plurality of light sources, comprising a bracket, means for rotatably mounting said sources on said bracket, means for applying current to a selected source, an arm supporting said bracket, and means whereby movement of said bracket with respect to said arm serves to electrically disconnect said source.

9. In a projection machine, a plurality of light sources, a mounting for selectively securing said sources in operative position, and means for slidably supporting said mounting and means whereby sliding movement of said mounting breaks the circuit of said light sources. l

l0. A support for a plurality of light sources comprising a rotatable sleeve, sockets spaced circumferentially of 'said sleeve and overhanging said sleeve 'axially and adapted to support a plurality of radially extending lights, said sockets having arms extending parallel to the axis of said sleeve and engaging the longitudinal surface thereof and clamping means for securing said arms to said sleeve, said clamping means being adapted to permit limited relative adjiistmenatherebetween.

11. A support for a plurality of light sources comprising a rotatable sleeve, sockets spaced circumferentially of said sleeve and overhanging said sleeve axially, said sockets having arms extending axially of said sleeve and engaging the same and clamp ing means for securing said arms to said sleeve, said clamping means beingadapted topermit limited relativeI adjust-nient therebetween, means for applying electric current to said, sockets, a stationary member mounted Within said sleeve and carrying a contact strip adapted to engage the base of a source in one of said sockets for applying current thereto. v

12. A support for a. plurality of light sources comprising a rotatable sleeve, sockets spaced circumferentially of said sleeve and overhanging said sleeve axially, said sockets having arms extending axially of said sleeve and engaging the same and clamping means for securing said arms to 

